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AlexFokin [52]
3 years ago
10

ASTRONOMY HELP :

Physics
1 answer:
sergeinik [125]3 years ago
4 0

Answer:

5: False

4: True

3: True (I think)

Explanation:

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5 0
3 years ago
If the resultant of two velocity vectors of equal magnitude is also of the same magnitude, then which statement must be correct?
Tamiku [17]

The correct option is C) The angle between the vectors is 120°.

Why?

We can solve the problem and find the correct option using the Law of Cosine.

Let A and B, the given two sides and R the resultant (sum),

Then,

R=A=B

So, using the law of cosines, we have:

R^{2}=A^{2}+B^{2}+2ABCos(\alpha)\\ \\A^{2}=A^{2}+A^{2}+2*A*A*Cos(\alpha)\\\\0=A^{2}+2*A^{2}*Cos(\alpha)\\\\Cos(\alpha)=-\frac{A^{2}}{2*A^{2}}=-\frac{1}{2}\\\\\alpha =Cos(-\frac{1}{2})^{-1}=120\°

Hence, we have that the angle between the vectors is 120°. The correct option is C) The angle between the vectors is 120°

Have a nice day!

4 0
3 years ago
1. Which of the following air pollutants combines with haemoglobin in our blood and renders it incapable to
enyata [817]
B, Carbon monoxide is the answer :)
7 0
3 years ago
What do a prism, a magnifying glass, a microscope, and eyeglasses ALL have in common? A) They are opaque. B) They refract light.
Elena L [17]
By definition, when the speed of the light changes when it passes from a material to another, this is called "Refraction of light". This happens when there is a difference in the index of refraction between both mediums o materials. Therefore, that speed depends of <span>the medium through  it passes. 
</span> 
 T<span>he index of refraction</span> is expressed as below: 
 n=c/v
 
 "n"  is <span>the index of refraction.
</span> "c" is <span>is the speed of light.
</span> "<span>v" is the phase velocity of light in the medium.
</span> 
 A prism, a magnifying glass, a microscope, and eyeglasses refract light. Therefore, the correct option is: B) They refract light.
6 0
3 years ago
Read 2 more answers
URGENT
Gemiola [76]

Answer:

5.25 J

Explanation:

W = PE = (f)(x)

PE = 35N*0.15m

PE = 5.25 N*m

1 N*m = 1 J

PE = 5.25 J

7 0
3 years ago
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